Ravi,
based off the error it looks like the csv files are possibly corrupted or are somehow incompatible with the code. To test this I opened them in Excel (no problems, on a mac) and resaved them as csv files. Diffing them showed a difference on the first line but I could not figure out what the issue was using my usual tools to show non-printable characters in a file.
I am happy to report however that the new files ran without error though. So I would suggest opening and resaving them using excel and trying again. If that still fails I can send you the versions I resaved to try.
Hope this helps
Ted